package Designpatterns.Dao;

public class SimpleDaoFactory {
    public static NewsDao getInstance(String key){
        switch (key) {
            case "mysql":
                return new NewsDaoMySqlImpl();
            case "oracle":
                return new NewsDaoOracleImpl();
            case "redis":
                return new NewsDaoRedisImpl();
            default:
                throw new RuntimeException("无效的数据库类型:"+key+" ,DAO获取失败");
        }
    }
}
